Asked why he thinks governments have been so slow to act, Pope Francissaid he thinks it's partly because, as the Old Testament says, "Man is stupid, a stubborn one who does not see". They speak very clearly.

"Here in Colombia and in the world, millions of people are still being sold as slaves; they either beg for some expressions of humanity, moments of tenderness, or they flee by sea or land because they have lost everything, primarily their dignity and their rights", the pope said just before praying before Claver's relics.

While in the city he also paid a visit to the home of St Peter Claver, a 17th-century Jesuit priest who performed Catholic rites for slaves in defiance of their colonial masters who treated them as chattel. "They are very clear, very precise", the pontiff said today during a press conference on the return leg of a five-day Colombia trip.

Flying from Colombia back to Rome late September 10, Pope Francis was asked about U.S. President Donald Trump'sdecision to end the Deferred Action for Childhood Arrivals program, which allowed some 800,000 young people brought to the United States illegally as children to stay in the country, working or going to school. It was on a plane during the 2016 election campaign that the pope said that Trump's plan of building a wall on the Mexican border "is not Christian".

Another journalist asked Francis why he thought it took "so long for governments to gain consciousness on this question, while in other areas, like on the question of arms, they can decide quickly?" "I didn't see the glass".

While in Colombia, Francis refrained from making any public comments about the deteriorating political and humanitarian situation next door in Venezuela, though he did meet briefly with a delegation of Venezuelan bishops.

Noting that "the scientists say clearly what are the roads to follow", Francis emphasized that "all of us have a responsibility...and I believe we must take it seriously".

In their article, the authors cite an earlier report which asserted that if carbon dioxide emissions continue to rise beyond 2020, or even remain level, "the temperature goals set in Paris become nearly unattainable" and the UN Sustainable Development Goals agreed upon in 2015 would also "be at grave risk".

But he also shows you how far the supposedly religious conservatives in this country have strayed: they brandish the Bible and claim to be legislating in the name of God, then they throw out the pope at the first sign of criticism from the church. He said that the technical or political aspects of the peace process are necessary, but they will only go so far.